Min-max criterion to the optimal design of vibration absorber in a system with Coulomb friction and viscous damping

2012 ◽  
Vol 70 (1) ◽  
pp. 393-400 ◽  
Author(s):  
Jie Fang ◽  
Qi Wang ◽  
Shimin Wang ◽  
Qingyun Wang
Keyword(s):  
Optimal Design ◽  
Coulomb Friction ◽  
Vibration Absorber ◽  
Viscous Damping

Dynamic Vibration Absorber Optimal Design With Emphasis on Complete Machine Dynamics Modelling

2008 ◽  
Author(s):  
Bohdan M. Diveyev ◽  
Zinovij A. Stotsko
Keyword(s):  
Optimal Design ◽  
Vibration Absorber ◽  
Vibration Absorbers ◽  
Rotating Machines ◽  
Dynamic Vibration Absorber ◽  
New Methods ◽  
Dynamic Vibration ◽  
Methods Development ◽  
Dynamic Vibration Absorbers ◽  
Dynamics Modelling

The main aim of this paper is improved dynamic vibration absorbers design with taking into account complex rotating machines dynamic The is considered for the complex vibroexitated constructions. Methods of decomposition and the numerical schemes synthesis are considered on the basis of new methods of modal methods. Development of of complicated machines and buildings in view of their interaction with system of dynamic vibration absorbers is under discussion.

Simulation of an On-Off Pneumatic Servomechanism

1967 ◽  
Vol 182 (1) ◽  
pp. 631-642 ◽  
Author(s):  
C. R. Burrows ◽  
C. R. Webb
Keyword(s):  
Computer Simulation ◽  
Coulomb Friction ◽  
Dead Zone ◽  
Analogue Computer ◽  
Viscous Damping ◽  
Acceleration Feedback ◽  
Spool Valve

This paper describes an analogue computer simulation of an on-off pneumatic servomechanism comprising a polarized relay with dead zone and hysteresis, power relays, and an on-off four-way spool valve supplying air to a cylinder driving an inertia load acted upon by viscous damping and Coulomb friction. The effect of varying the amount of friction and of position, velocity, and acceleration feedback is studied. The effect of the addition of stabilizing tanks is also considered.

scholarly journals On the Stability of Digital Position Control with Viscous Damping and Coulomb Friction

2017 ◽  
Vol 61 (4) ◽  
pp. 266 ◽  
Author(s):  
Csaba Budai ◽  
László Kovács L.
Keyword(s):  
Discrete Time ◽  
Dry Friction ◽  
Coulomb Friction ◽  
Control Parameter ◽  
Position Control ◽  
Viscous Damping ◽  
Sampled Data ◽  
Stable Domain ◽  
The Stability ◽  
Parameter Values

In this paper, we investigate the combined effect of viscous damping and Coulomb friction on sampled-data mechanical systems. In these systems, instability can occur due the sampling of the applied discrete-time controller which is compensated by the two different physical dissipation effects. In order to investigate the interplay between these, we focus on how the stable domain of operation is extended by the dry friction compared to viscous damping. We also show that dry friction causes concave envelope vibrations in this extended region. The analytical results, presented in the form of stability charts, are verified by a detailed set of simulations at different representative control parameter values.

Parametric Identification of Systems With Dry Friction and Nonlinear Stiffness Using a Time Series Model

1996 ◽  
Vol 118 (2) ◽  
pp. 252-263 ◽  
Author(s):  
Q. Chen ◽  
G. R. Tomlinson
Keyword(s):  
Time Series ◽  
Dry Friction ◽  
Coulomb Friction ◽  
System Parameter ◽  
Parametric Identification ◽  
Time Series Model ◽  
Viscous Damping ◽  
Nonlinear Stiffness ◽  
Transform Method ◽  
New Type

A new type of time series model, the AVD model which accommodates the Acceleration, Velocity and Displacement simultaneously, has been used to estimate the characteristics of nonlinear single and multi-degree of freedom systems with dry Coulomb friction, viscous damping and nonlinear stiffness. Numerical results via simulation are compared with those from a Fourier transform method, which suggests that the AVD model is a powerful technique for nonlinear system parameter identification.

scholarly journals Vibration absorber optimization for boom-sprayer

2019 ◽  
Vol 27 (4) ◽  
pp. 504-515
Author(s):  
Ivan Kernytskyy ◽  
Serhii Baranovych ◽  
Serhii Berezovetskyi ◽  
Bohdan Diveyev ◽  
Orest Horbay ◽  
...  
Keyword(s):  
Optimal Design ◽  
System Modeling ◽  
Design System ◽  
Vibration Absorber ◽  
Base System ◽  
Main Task ◽  
Vibration Absorbers ◽  
Dynamic Vibration Absorber ◽  
Dynamic Vibration ◽  
Dynamic Vibration Absorbers

The main task of this work is to analyze optimal design-system of the booms of boom-sprayers. The discrete-continue models of machines dynamics of such wheeled machines as boom-sprayer with elongated boom element with the attachment of dynamic vibration absorbers are offered. The algorithms for vibration decreasing of boom are received. The new vibroabsorbing elements are proposed. The paper contemplates the provision of dynamic vibration absorbers (DVA) of buffered impact masses and particle type. Such originally designed absorbers reduce vibration selectively in maximum vibration mode, without introducing vibration in other modes. The damping results from the exchange of momentum during impacts among the masses and masses and stops as the structure vibrates. A technique is developed to give the optimal DVA’s as single degree of freedom (SDOF) buffered system. The one-digit values are established not only for the dynamic vibration absorber parameters, but also for mechanical parameter of base structure – boom in connection points of the dynamic vibration absorbers. Finally, present research develops the genetic algorithms for optimal design searching by discrete-continuum DVA’s system – base system modeling.

Sign in / Sign up

Export Citation Format

Share Document